Read-only eth_call to XRC137.getRule(), returning the runtime rule JSON string.
AI agents call read_xrc137_rule_json to retrieve information from XGR MCP Gateway without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a read-only query operation against a blockchain smart contract (XRC137.getRule()). It retrieves rule configuration data with no side effects, reversibility concerns, or financial impact. Typical read operations carry low severity since they expose information but do not alter state or trigger external actions.
From the tool's definition Tool name explicitly prefixed 'read_', description states 'Read-only eth_call', returns data without modification ('returning the runtime rule JSON string')
Attacks that exploit this kind of access
Read-only eth_call to XRC137.getRule(), returning the runtime rule JSON string. It is categorised as a Read tool in the XGR MCP Gateway MCP Server, which means it retrieves data without modifying state.
Register the XGR MCP Gateway MCP server in PolicyLayer and add a rule for read_xrc137_rule_json: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches XGR MCP Gateway. Nothing to install.
read_xrc137_rule_json is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the read_xrc137_rule_json rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for read_xrc137_rule_json. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
read_xrc137_rule_json is provided by the XGR MCP Gateway MCP server (xgr-network/xgr-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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